Yamaha YB50 Service Manual page 29

INTRODUCTION / PERIODIC MAINTENANCE /
PERIOD INSPECTION AND ADJUSTMENTS
INTRODUCTION
This chapter includes all information necessary to carry out inspections and adjustments recom-
mended. These preventive maintenance procedures, if they are correctly followed, will ensure the
most reliable operation of the vehicle and a longer useful life. The need for overhauls and costly
repairs will be greatly reduced. This applies both to vehicles which are already in service and to
new vehicles which are ready for sale. All service technicians should familiarise themselves with
the entire chapter.
PERIODIC MAINTENANCE / LUBRICATION INTERVALS
N. INTEM
1 * Fuel line
2 Spark Plug
3 Air filter element
4 * Front brake
5 * Rear brake
6 * Brake hose
7 * Wheels
8 * Tires
9 * Wheel
bearings
10 * Steering bearings
11 * Chassis fasteners
12 Centerstand
13 * Front fork
14 * Rear shock absorber
assembly
15 * Carburetor
16 * Autolube pump
17 Final gear oil
18 * V-belt
19 Front and rear brake
switches
20 * Moving parts
21 Lights, signals
and switches
• Since these items require special tools, data and technical skills, have a Yamaha/MBK dealer perform the ser-
vice.
NOTE:
• The air filter needs more frequent service if you are riding in unusually wet or dusty areas.
• Hydraulic brake service
•• Regularly check and, if necessary, correct the brake fluid level.
•• Every two years replace the internal components of the brake master cylinder and caliper, and change the brake fluid.
•• Replace the brake hoses every four years and if cracked or damaged.
LUBRICATION INTERVALS
CHECK OR MAINTENANCE JOB
• Check fuel hoses and vacuum hose
for cracks
• Check condition.
• Clean and regap.
• Replace.
• Clean.
• Replace.
• Check operation, fluid level and vehicle for
fluid leakage.
• Replace brake pads.
• Check operation and adjust brake lever freeplay.
• Replace brake shoes.
• Check for cracks or damage.
• Replace. (See NOTE on page 6-5)
• Check runout and for damage.
• Check tread depth and for damage.
• Replace if necessary.
• Check air pressure.
• Correct if necessary.
• Check bearing for looseness or damage.
• Check bearing play and steering for roughness.
• Lubricate with lithium-soap-based grease.
• Make sure that all nuts, bolts and screws are
properly tightened.
• Check operation.
• Lubricate.
• Check operation and for oil leakage.
• Check operation and shock absorber for oil
leakage.
• Check starter (choke) operation.
• Adjust engine idling speed.
• Check operation.
• Bleed if necessary.
• Check oil level and vehicle for oil leakage.
• Change.
• Replace
• Check operation.
• Lubricate.
and cables
• Check operation.
• Adjust headlight beam.
ODOMETER READING
1 6
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3-1
INSP
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( x 1.000 km)
12 18 24
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Whenever worn to the limit
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Whenever worn to the limit
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Every 4 years
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Every 24.000 km
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ANNUAL
CHECK
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